How are myofilaments and sarcomeres of myofibrils related?

Q: What prevents cross-bridges from attaching to sites on the thinfilaments in a resting skeletal…

A: Muscles are the tissues able to contract in response to stimuli.

Q: Which item is biggest? A. myosin head B. myofibril C. troponin D. sarcomere

A: Muscles are compact structures made up of highly tensile , strong, long, multinucleated cells called…

Q: Identify the major events that occur during skeletal musclefiber contraction.

A: The skeleton is composed of bones, cartilages, tendons, and ligaments. The body movement is…

Q: During a single muscle twitch, the sarcomeres within a muscle contract maximally. How can you…

A: A contraction of muscle fibers generate when an action potential pass down the motor neurons. A…

Q: What is migrating myoelectrical complex (MMC)?

A: At fasten time, The contraction of muscle in stomach and in small intestine to clean the residual of…

Q: List the Functions of ATP in Skeletal Muscle Contraction?

A: Muscle is a bundle of fibrous tissue, which is present in many higher animal bodies. There are three…

Q: List five proteins of the myofilaments

A: We know that Muscles are the soft tissue found in our body. Muscles work to create strength and…

Q: What happens when theoxygen supply is insufficientto maintain aerobic cellularrespiration during…

A: Cellular respiration is a combination of metabolic reactions that occurs in the cells of organisms.…

Q: What happens to the I band and H zone as muscle contracts? Do the lengths of the thick and thin…

A: Numerous bundles which make up the skeletal muscle are called fascicles and each of these is…

Q: List the various Myofibril Structures?

A: Myofibrils are made up of proteins organized into filaments. The filaments can be thick filaments or…

Q: Identify the structure highlighted in green: 三三園 Sarcolemma Myofibril Sarcoplasm

A: The image given is of  excitation-contraction coupling mechanism in skeletal muscle.

Q: Thick myofilaments consist mainly of the protein _____.

A: Thick myofilaments consist mainly of the protein called Myosin.

Q: myofibrils or sarcomeres present in smooth muscle fibers?

A: Myofibrils are the long filaments which are arranged parallel to each other to form muscle fibers.…

Q: Identify three processes in a muscle twitch that require ATP?

A: When one muscle fiber contracts in response to a command (stimulus) from the nervous system, it is…

Q: Describe the length-tension relationship in skeletal muscle fibers.

A: The skeleton muscle varies in shape, size, and arrangement of fibers. These range from small strands…

Q: Explain the length-tension relationship in skeletal muscle contraction.

A: Tension in muscles is composed of the forces generated by many cross-bridge formations. It is the…

Q: Briefly explain ultrastructrure of myofibril.

A: The human skeletal muscles are made up of many muscle bundles or fascicles. Different muscle bundles…

Q: What role does calcium have in muscle contraction?

A: The signal of muscle contraction initiates from the central nervous system. During the process of…

Q: How does speed of muscle action affect the following relationships; force-velocity and force-power?

A: Muscle action : There are three types of muscle contractions i.e. concentric, isometric and…

Q: what is a myofibril

A: To describe: To describe myofibril and its structure.

Q: If a single twitch of a skeletal muscle fiber lasts 40 msec, what action potential stimulation…

A: In human physiology, skeletal muscle is defined as the vital organ of muscular system which is also…

Q: Compare and contrast myofibrils and myofilaments.

A: Muscles are required in breathing, talking, running, walking, and anybody movement. Actin and…

Q: What do you mean by myofibrils?

A: Muscle cells are also referred to as myocytes. These are the cells that made up the muscle tissue.…

Q: What are the positions ofactin and myosin molecules inthe sarcomere before andduring the…

A: The sarcomere is the smallest functional unit of a skeletal muscle fiber. It is a highly organized…

Q: Describe the structure of myosin molecules and how theycombine to form a myosin myofilament

A: The myofibrils are comprised of actin (thin filament) and myosin (thick filament). Muscle…

Q: State the function of myofibrils.

A: Muscle is a soft tissue observed in maximum animals. The characteristic of muscle is to provide…

Q: What factors contribute to the amount of tensionproduced in an individual muscle fiber?

A: The amount of tension produced in an individual muscle fiber depends on the cross-sectional area of…

Q: What do you mean by myosin myofilaments?

A: Muscles consist of munerous muscle fibres. Each muscle fibre contains many myofibrils having…

Q: Experimenters can separate F-actin thin myofilaments frommyosin thick myofilaments. First they…

A: Muscle tissues can change their length in response to the stimulus.

Q: What are some examples of movement created by the contraction of sarcomeres of the muscle cells?

A: Muscle tissues are of three types: Skeletal muscle, cardiac muscle, and smooth muscle. Each consists…

Q: What aspect of creatine phosphate allows it to supply energy to muscles?

A: Creatinine phosphate is a phosphorylated creatinine molecule that acts as a fast release reserve of…

Q: Myosin myofilaments area. attached to the Z disk.b. found primarily in the I band.c. thinner than…

A: The actin-myosin interaction is most commonly known for its role in sliding filament theory, where…

Q: Thin and thick filaments are organized into functionalunits called ________.a. myofibrilsb.…

A: Myofibrils are made up of myofilaments. These myofilaments are myosin and actin. T-tubules are the…

Q: What voltage produced maximal contraction of this muscle?

A: Muscle is a soft tissue which is found in most animals. They are helpful in providing movement and…

Q: Explain the organization of myofibrils, myofilaments, and sarcomeres

A: Muscular tissues consists of muscle fibers having the properties of contraction. Muscular tissues…

Q: How do actin and myosin interact in a sarcomere to bring about muscle contraction? What roles do ATP…

A: Muscle contraction is the contraction of contractile units of muscle fiber or sarcomere, in response…

Q: skeletal muscle is packed with myofibrils consisting of a repeating chain of contractile units we…

A: Sarcomere shortens and then the muscle contract. Sarcomere is considered as the smallest unit of…

Q: What is the effect of pH on hydration of myofibrillar proteins

A: Myofibrillar protein  These are the main protein  of skeletal muscle and constitute about 50 % of…

Q: How do G actin, F actin, tropomyosin, and troponincombine to form an actin myofilament? Name the ion…

A: Linear polymers of G-actin subunits that occur as microfilaments in the cytoskeleton or as thin…

Q: List five proteins of the myofilaments and describe their physical arrangement.

A: In muscle cells, myofilaments are the three protein filaments of myofibrils.

Q: Why is it advantageous to have a highly folded sarcolemma at the motor end plate?

A: Neuromuscular junction is area or junction or connection between the end of the motor nerve plate…

Q: Explain how microscopic and macroscopic anchoring of musclefilaments enables you to bend your elbow

A: Muscles are connective tissues that along with the skeletal system help in voluntary and involuntary…

Q: The primary role of calcium in skeletal muscle contraction?

A: Answer: Muscle contraction is the process of generating tension between the muscle cells, which is…

Muscle Action

A change in the body or a bodily organ as a result of its functioning is referred to as an action. Muscle action can be defined as the specific movement of a bodily part generated by the contraction of a muscle. The muscle proteins actin and myosin are the important contractile proteins involved in muscle action. Muscle contraction, in addition to movement, serves several other important functions in the body, including posture, heat generation, and joint stability. Muscle contraction maintains posture, which includes standing and sitting.